Excavating-machine.



J. G. FOGARTY ExcAvATlNG MAcHfNE.

` APPLICATION FILED JAN- 311 1914.

2 SHEETS-SHEET I.

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3 ewtoz Patented Aug. 14, 1917.

J. G. FOGARTY. EXCAVATING MACHINE.

APPLICATION man 1AN.31,1914.

Patented Aug. 14, 1917.

2 SHEETS-SHEET 2.

TNTTED @TATE PATENT FFTQE.

JOHN G. EOGARTY, 0F ROCHESTER, NEW YORK, AssIeNoR To JOHN EOGARTY Co.,INC., OE ROCHESTER, NEW YORK, A CORPORATION OE NEW YORK.

EXCAVATING-MACHINE.

Specification of Letters Patent.

Patented Aug. 141, 1917.

Application inea January s1, 1914. serial No. 815,631.

To all whom z' may concern: y

Be it known that I, JOHN G, FOGARTY, of Rochester, in the county ofMonroe and State o1"- New York,- have invented Certain new and usefulImprovements' in Excavating-Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference being had to the accompanying drawings, formlng a part of thisspeciication, and to the reference-numerals marked thereon.

My invention relates to excavating machinery, and it has for its objectto improve the construction of this class of devices so as to produce astrong and rigid arrangement, capable of exerting a correspondinglygreat amount of power. Another object of the device is to afford, inconnection with an excavating bucket, an arrangement for balancing theparts, and particularly the means for guiding the bucket rope or cablefrom the boom to the bucket whereby the latter is properly centered atall times, and an equal strain is exerted in all directions about theaxial point of the bucket support. Another purpose of my invention is toprovide a bucket that is rotatable upon its support, so as to make itpossible to have it engage the ground at any angle, and further inproviding for automatically locking the bucket against rotative movementthe instant that it comes in contact with the ground, and for releasingit to permit relative rotation as soon as the bucketleaves the ground.To these and other ends the invention consists in certain improvementsand combinations of parts all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof the specication.

In the drawings:

Figure l is a side elevation showing the outer end of the boom of anexcavating machine, and a bucket supported thereon, embodying apreferred arrangement according to my inventionj Fig. 2 is a plan viewof the support;

Fig. 3 is a bottom plan view of the same;

Fig. 4 is a sectional view on the line ta- 4a of Fig. 1, with parts inelevation;

Fig. 5 is a plan view of the carrier for the bucket; f

AFig, 6 is a bottom plan view of the ear-a rxer; n

Fig. 7 is a sectional view on the line' 7 L of Fig. l;

Fig. 8 is a side elevation of a portion of the bucket, showing the formof the bucket teeth, and

Fig. 9 is a sectional view on the line Sia-9a of Fig. 8.

Similar reference numerals throughout the several views indicate thesame parts.

In the present construction, l designates the boom of a machine whichmay be of the usual type of construction in excavating machinery,provided at its outer end with the arms 2, pivotally mounted upon whichis the support for the bucket. The bucket support is adapted to hold thelatter in such a manner as to permit a relative rotating movement, toenable the bucket to be placed at any desired angle with relation to thework. To this end, the support comprises a base 3 having a centralopening4 for a purpose that will presently appear, and provided withvertical standards 5 having extensions 6 which are pivoted to theaforementioned arms 2, while 7 are lateral portions provided on thestandards 5 and forming bearings for the spindles 8 upon which are fixedthe sheaves or pulleys 9 for a purpose that will presently be mentioned.

The base portion 3 of the support coperates with the carrier upon whichthe bucket is mounted, the latter being arranged for both a rotating andvertical movement relatively to the support. To this end, the carrierembraces a bottom 10 and an annu* lar flange 1l (see Fig. 7), to theupper edge of which is secured an inwardly projecting ring 12 adapted toengage the upper side of the base 3, and thus to prevent separation ofthe carrier and the support. By this means, the carrier is permitted torotate on the base 3, and to also move vertically relatively to thesupport until the bottom l0 contacts with the base of the support. Thisenables the bucket to be swung around to any desired position, so as toenter the ground at whatever angle required, and it is also desirablethat as soon as the bucket comes in Contact with the ground, furtherrotation relatively t0 the support be prevented. To this end, I provideautomatic means for locking the support and carrier against relativeturninfr as the bucket strikes the ground, or when tie upper surface ofthe bottom l0 ot the carrier engages the lower surface of the base 3 ofthe support. This is preferably accomplished by locking means providedon the carrier and the support, such means in the present embodimentconsisting of teeth 13, between which are arranged recesses 121, asimilar series of teeth and recesses being formed on the base of thesupport and on the carrier as shown in Fig. 7. From this figure, it willbe seen that when the carrier moves vertically with relation to thesupport, this action taking place as the bucket engages the ground, theteeth on the carrier will interlock with the recesses on the support,and further relative rotation is prevented until the bucket is againmoved clear of the ground.

The carrier is provided with a central opening 15 disposed in verticalalinement with the beforementioned opening 4, and carries trunnions 16forming bearings that receive the arms 17 connected with the bucketmembers 18. Preferably, the bucket is constructed as shown in Fig. 1,consisting of bucket members 18 already referred to, which are pivotedtogether by means of the hinge block 19, the latter being provided witha pair of pulleys 20 and 21 arranged as shown. The carrier is providedwith a pair of guide pulleys 22 and 23 disposed on opposite sides of theopening 15 to guide'the bucket rope 'or cable 24, whereby the latterpasses from the boom 1 to the upper pulleys 9, extending thencedownwardly in a vertical line, through the pulleys 22 and 23, and isthereafter connected to the bucket. The carrier is further provided withsheaves or Ipulleys 25 which are arranged at opposite points on theunder side of the carrier, and receive the bucket cable in the mannershown in Fig. 4, the latter being attached to the bucket finally at 26.rIhe arrangement of the pulley 2l relatively to the carrier is such asto permit the bucket cable to extend in a direct vertical. line upwardlythrough the carrier and support, and this affords acom pletely balancedconstruction which can be operated more readily and more efficiently.rThe 'balance ofthe parts is further aided by the arrangement of thepulleys 25, the disposal of which causes an equal tension to be exertedaround the axial point of the carrier, thus permitting the bucket to beturned easily to any desired point on the support without detracting inany degree from the proper'coperation between the bucket and the bucketcable, the position of the latter being the same for all adjustments ofthe bucket. Y

Quite frequently, it is desirable to change the angular position of thebucket as it comes into engagement with the material to be excavated andit is for this reason that the carrier is rotatively mounted on thesupport as alreadydcscrlbcd, `Some means however must be provided tohold the carrier and the support in fixed relation, after suchadjustment is once made, so that the position of the bucket will notchange during the operation, and this is accomplished by locking theparts together automatically at the moment that the bucket engages thematerial to be lifted. The instant the bucket is lifted clear of theground, it is again free te be turned on the support, but during thedigging operation it is securely locked in fixed position, in the manneralready described.

In Figs. 8and 9 I have shown a preferred form of bucket tooth, ofdetachable charac-A ter. 'The bucket is preferably provided with aseries of tapered ways 27, while 28 designates a tooth provided with atapered or wedge-shaped shank 29 adapted to engage the tapered ways 27.The ways 27 overhang the shank 29 as shown in Fig. 9, and with thisconstruction, the tooth is held more rig idly in proportion to thepressure brought against it so that in the actual working operation, thetendency is constantly to force the shank of the tooth more tightly intoits socket. At the same time, the teeth can be removed when necessary bya slight blow from a hammer or in some other convenient manner.

I claim as my invention:

1. In an excavating machine, the combination with a boom, of a supportpivoted to the boom, a carrier rotatively mounted on the support andmovable also in the direction of its axis of rotation relatively tothesupport, and means brought into operation by the relative axial movementfor locking the support and carrier against relative turning.

2. In an excavating machine, the combination with a boom, of a supportpivoted to the boom, a carrier rotatively mounted on the support andmovable also in the direction of its axis of rotation relatively to thesupport, and interlocking means on the support and carrier adapted tohold said parts against relative turning at the limit of their relativeaxial movement.

3. In an excavating machine, the combination with a boom, of a supportpivoted to the boom, a carrier rotatively mounted on the support andmovable also in the direction of its axis of rotation relatively to thesupport, a series of coperating teeth on the adjacent faces of thesupport and carrier for locking said parts against relative turning,said adjacent faces being normally in spaced relation to each other andadapted to move into engagement with one another.

4. In an excavating machine, the combination with a boom,of a supportpivoted on in the support, a bucket comprising a pair permit said cableto pass through the support on the boom and to the bucket in a verticalline.

5. In an excavating machine, the combination with a boom, of a supportpivoted on said boom and having a centrally disposed opening in itsbase, a carrier rotatively mounted on the support and movable also inthe direction of its axis of rotation relatively to the support,interlocking means on the support and carrier adapted to hold said partsagainst relative turning When the adjacent faces are in engagement, thecarrier having an opening in alinement With said opening in the support,a bucket mounted on the carrier, and a bucket cable passing from theboom through said openings in the support and carrier, and extendingi'ovvnwardly toward the bucket in a vertical 6. In an excavatingmachine, the combination With a boom, of a support pivoted on said boomand having a centrally disposed opening in its base, a carrierrotatively mounted on the support and movable also in the direction ofits axis of rotation relatively to the support, coperating teeth on theadjacent faces of the support and carrier for locking said parts againstrelative turning When in engagement with each other, the carrier havingan opening in alinement With said opening in the support, a bucketcomprising a pair of bucket members pivoted together, connecting rodssecured to said bucket members and pivoted to the aforesaid carrier, apair of pulleys disposed on the carrier on opposite sides of saidopening, pulleys on the bucket, and a bucket cable passing from the boomthrough said openings, around the aforementioned pulleys, and attachedto the bucket, the arrangement being such as to permit said cable topass through the support on the boom and to the bucket in a verticalli'ne.

7. In an excavating machine, the combination with a boom, of a supportmounted on said boom and having a centrally disposed opening in itsbase, a carrier mounted on the support having an opening in alinementWith the opening in the support, pulleys arranged on the underside ofthe carrier on opposite sides of said opening, and a bucket cablepassing from the bottom through the openings in the support and carrierextending downwardly toward the bucket in a.' vertical line andcoperating with said pulleys on the carrier.

8. In an excavating machine, the combination With a support, of acarrier suspended from and rotatively mounted on the support, thecarrier being movable in the direction of its axis of rotationrelatively to the support and normally spaced therefrom and freelymovable about its axis, a bucket mounted upon the carrier, and meansbrought into operation by engagement of the bucket with the ground forlocking the support and carrier against relative turning as they aremoved toward each other.

9. In an excavating machine, the combi nation with a support, of acarrier suspended from and rotatively mounted on the support, thecarrier being movable in the direction of its axis relatively to thesupport and normally freely movable about its axis, a bucket arrangedupon the carrier, and interlocking means on the support and carrieroperating to hold said parts against relative turning when the bucketengages the ground.

10. In an excavating machine, the combination With a support, of acarrier suspended therefrom and rotatively mounted thereon, the carrierbeing movable in the direction of its axis of rotation relatively to thesupport and normally freely movable about said axis, a bucket mountedupon the carrier, a series of coperating locking devices on the adjacentfaces of the support and carrier acting to lock said parts againstrelative turning, said adjacent faces being nor- 4mally in spacedrelation to each other and moved to engage one another When the bucketcomes in contact With the ground. JOHN G. FOGARTY. Witnesses:

I-I. E. STONEBRAKER, RUSSELL B. GRIFFITH.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents. Washington, D. C.

